Engine oil provides proper lubrication of the friction surface between the sliding piston and the cylinder and assures smooth transmission of the force applied to the piston by ignition, but there are issues involved with the quantity of oil used. Using too much oil is expensive because more oil is consumed than necessary,but if too little oil is used, friction between the piston and the cylinder liner increases, which can lead to such problems as reduced fuel efficiency,burning, sticking, and chipping of the ring lands. This study focuses on changes in fuel consumption related to suction force during the suction stroke. Parameter design was carried out on the piston, which greatly affects oil consumption,and its piston rings, which play a role in gas sealing and oil control,making use of simulation and the standard S/N ratio. As a guideline for the optimal design of the oil pan with respect to suction force, it was found that the oil pan should have a large volume and the oil duct should have a small area.
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